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CreateMosaicDataset \\files\gisshare\GIS\Data\Images\Rockville_Ortho2020_3in.gdb Rockville_OrthoMosaicDataset2020_3in_2 "PROJCS['NAD_1983_StatePlane_Maryland_FIPS_1900_Feet',GEOGCS['GCS_North_American_1983',DATUM['D_North_American_1983',SPHEROID['GRS_1980',6378137.0,298.257222101]],PRIMEM['Greenwich',0.0],UNIT['Degree',0.0174532925199433]],PROJECTION['Lambert_Conformal_Conic'],PARAMETER['False_Easting',1312333.333333333],PARAMETER['False_Northing',0.0],PARAMETER['Central_Meridian',-77.0],PARAMETER['Standard_Parallel_1',38.3],PARAMETER['Standard_Parallel_2',39.45],PARAMETER['Latitude_Of_Origin',37.66666666666666],UNIT['Foot_US',0.3048006096012192]];-120561100 -95444400 3048.00609601219;-100000 10000;-100000 10000;3.28083333333333E-03;0.001;0.001;IsHighPrecision" 3 # NATURAL_COLOR_RGB "Red 630 690;Green 530 570;Blue 440 510"
CalculateStatistics W:\Data\Images\Rockville_Ortho2020_3in.gdb\Rockville_OrthoMosaicDataset2020_3in 1 1 # OVERWRITE "Feature Set"
Rockville_OrthoMosaicDataset2020_3in
file://\\files\gisshare\gis\Data\Images\Rockville_Ortho2020_3in.gdb
Local Area Network
1237000.000098
1282000.000098
503000.000021
549000.000021
1
002
Projected
GCS_North_American_1983
Linear Unit: Foot_US (0.304801)
NAD_1983_StatePlane_Maryland_FIPS_1900_Feet
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ItemDescription
Shawn Benham
Sanborn Map Co., Inc.
Vice President of Programs
719-502-1296
1935 Jamboree Drive, Suite 100
Colorado Springs
Colorado
80920-5358
sbenham@sanborn.com
20210315
ArcGIS Metadata
1.0
Lisa Lowe
Geographical Information Office Dept. of Information Technology
410-697-9424
Room 4.213
Crownsville
Maryland
21032
lisa.lowe@maryland.gov
Rockville Ortho 2020 3-inch
2020-10-01
Maryland Geographical Information Office Dept. of Information Technology
remote-sensing image
<DIV STYLE="text-align:Left;"><DIV><P><SPAN>This metadata record describes the 0.25-foot pixel resolution digital orthoimagery produced of Rockville-Gaithersburg Maryland by the Sanborn Map Company. The orthoimagery provided is 4-band (R, G, B, NIR), 8-bit per pixel and delivered in section tiles in uncompressed TIFF/TFW, compressed SID/SDW (20:1), compressed JP2000 (20:1), and compressed ECW (25:1) formats in feet and meters. The data was collected on March 21, 2020 at an altitude 4733 feet (AGL) using an UltraCam Eagle camera and complies with the NSSDA standards, large scale maps at 1" = 100'. This orthoimagery is published in Maryland State Plane, NAD 1983 (2011), U.S. Survey Feet.</SPAN></P></DIV></DIV>
Orthorectified orthoimagery for Rockville-Gaithersburg may serve as a basemap for GIS applications.
Lisa Lowe
Geographical Information Office Dept. of Information Technology
410-697-9424
Room 4.213
Crownsville
Maryland
21032
lisa.lowe@maryland.gov
Rockville Gaithersburg
Maryland
Ortho
Orthophotography
Photography
Imagery
Rockville Gaithersburg
Ortho
Orthophotography
Maryland
Photography
Imagery
Rockville
orthophoto
aerial
None
This data may be used by the requested party for stated purposes and should not be re-distributed.
<div style='text-align:Left;'><div style='font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px;'>The City of Rockville provides this dataset or map to be available and accessible for public use and sharing, “as is.”</div><div style='font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px;'><br /></div><div style='font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px;'>This dataset or map may be derived from a variety of sources of varying quality and accuracy. Accuracy, completeness, correctness, and currency are not guaranteed. Maps are provided for informational purposes only and have not been prepared for and are not suitable for legal, engineering, or surveying purposes or any other site-specific purpose. Maps provided do not represent an on-the-ground survey and represent only the approximate relative location of property boundaries and other features.</div><div style='font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px;'><br /></div><div style='font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px;'>DATASETS AND MAPS ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. </div><div style='font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px;'><br /></div><div style='font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px;'>The City of Rockville assumes no responsibility or liability for any errors, omissions, or inaccuracies in the datasets or maps provided, regardless of the cause of such, or for any decision made, action taken, or action not taken by the user in reliance upon any maps or data provided herein. The user assumes the risk that the information may not be accurate.</div></div>
Version 6.2 (Build 9200) ; Esri ArcGIS 10.7.1.11595
-77.2593
-77.1078
39.0531
39.1691
ground condition
2020-03-21
1
-77.265727
-77.106807
39.174070
39.047519
Maryland Geographical Information Office Dept. of Information Technology
This data is meant for use by requested parties. This data cannot be used without express consent.
Since the ortho images are raster products, the logical consistency is based on how well the images fit between image tiles and between individual photo frames used to produce the ortho mosaics.
The ortho image tiles are checked for missing pixels, gaps, overlaps and other anomalies generally associated with digital orthophoto products. Any discrepencies in the ortho tiles are resolved through the use of proprietary and industry editing tools. Once the images are copied to the deliverable media they are further checked for naming, image completeness, and ability to be loaded in ArcMap.
N/A
Attribute accuracy does not apply to orthoimagery.
N/A
This orthoimagery meets ASPRS Class 1 Accuracy Standards for 1"=100' scale mapping
N/A
Geodetic ground control is used to create a digital control file and control report as well as QC check of ortho accuracy. Predefined points within the project area are targeted and photo-identifiable locations are measured. These points along with their precise coordinates are used in the AT process and to check the horizontal accuracy of the resulting orthophotos.
Ground Control
CONT
2020-07-15
Sanborn Map Co., Inc.
vector digital data
ground condition
2020-07-15
Raw Aerial Imagery - UltraCam Eagle Digital Aerial Camera, Sanborn Map Company. Imagery and GPS/IMU data is downloaded from disc on the plane to disc on the ground. GPS/IMU mission data is processed together with simultaneously collected ground-based GPS base station data in forward and reverse directions. This precisely determines the aerial camera's position and orientation in the terrain (project) coordinate system and allows for correct orientation of the imagery.
Aerial Imagery
IMG
2020-03-16
Sanborn Map Co., Inc.
Raster data
ground condition
2020-03-16
LiDAR data
LiDAR
DEM
2020-07-15
Sanborn Map Co., Inc.
Vector data
ground condition
2020-07-15
Image acquisition by Sanborn Map Company on March 16, 2020 using an UltraCam Eagle Camera. Imagery and GPS/IMU data is downloaded from disc on the plane to disc on the ground. GPS/IMU mission data is processed together with simultaneously collected ground-based GPS base station data in forward and reverse directions. This precisely determines the aerial camera's position and orientation in the terrain (project) coordinate system and allows for correct orientation of the imagery.
2020-03-16
Shawn Benham
Sanborn Map Co., Inc.
Vice President of Programs
719-502-1296
1935 Jamboree Drive, Suite 100
Colorado Springs
CO
80920
US
sbenham@sanborn.com
Using the processed GPS/IMU data and correctly oriented imagery, a bundle adjustment is computed (AT).
2020-07-06
Shawn Benham
Sanborn Map Co., Inc.
Vice President of Programs
719-502-1296
1935 Jamboree Drive, Suite 100
Colorado Springs
CO
80920
US
sbenham@sanborn.com
Orthoimagery is rectified using the AT solution and LiDAR. Once completed, the orthoimagery is color balanced to the acceptable parameters established by the customer. Orthoimagery then undergoes manual quality control to check for issues as outlined in the Digital Orthoimagery Acceptance Criteria document. Issues such as warps, smears, misalignments, etc. are corrected using proprietary tools and Adobe PhotoShop. Upon completion of the QC process, the orthos are provided to the client for review in uncompressed TIFF/TFW.
2020-07-06
Shawn Benham
Sanborn Map Co., Inc.
Vice President of Programs
719-502-1296
1935 Jamboree Drive, Suite 100
Colorado Springs
CO
80920
US
sbenham@sanborn.com
DEM Review/Updating. The LiDAR surface is reviewed and updated as needed to meet the final orthorectification standards set in this project.
2020-07-15
Shawn Benham
Sanborn Map Co., Inc.
Vice President of Programs
719-502-1296
1935 Jamboree Drive, Suite 100
Colorado Springs
CO
80920
US
sbenham@sanborn.com
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1282000.000098 549000.000021
1282000.000098 503000.000021
1259500.000098 526000.000021
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0.250000
184000
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EPSG
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255.000000
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Green
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255.000000
0.000000
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